20H1M1F1BR (EP44, 20HMFB)

For the manufacture of turbine fasteners and flanged connections of steam lines and valves.

Fasteners turbines and steam pipes and flanges equipment with an operating temperature up to 580 degrees.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Heat resistant steels and alloys	Heat-resistant relaxation-resistant steel

Chemical composition

Standard	Fe, %	Si, %	B, %	Mn, %	Cr, %	Ti, %	Ni, %	V, %	Ce, %	P, %	C, %	S, %	Nb, %	Mo, %
Standard	Fe, %	Si, %	B, %	Mn, %	Cr, %	Ti, %	Ni, %	V, %	Ce, %	P, %	C, %	S, %	Nb, %	Mo, %
GOST 20072-74	94.305–96.72	< 0.37	< 0.005	0.5–0.8	1–1.5	< 0.06	< 0.3	0.7–1	0.05–0.1	< 0.03	0.18–0.25	< 0.03	0.05–0.15	0.8–1.1

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rod	GOST 20072-74				780	665	14	50	590	Hardening and tempering

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy	GOST 20072-74	hot rolling	229

Standards

Standard	Description
Standard	Description
GOST 20072-74
TU 14-1-522-72

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
B	%	Bor
Mn	%	Manganese
Cr	%	Chrome
Ti	%	Titan
Ni	%	Nickel
V	%	Vanadium
Ce	%	Cerium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Nb	%	Niobium
Mo	%	Molybdenum

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness